BUN/Creatinine Ratio: High & Low Levels + Normal Range
A blood urea nitrogen (BUN) test measures the amount of urea nitrogen in your blood. Levels of urea nitrogen is one marker on how well your kidneys are working. This is a simple test done by drawing blood out of your body through a vein in your arm. Urea is a waste product formed in the liver that travels through your blood to the kidneys, which then filters it out of the blood. Aug 17, · General reference ranges for a normal BUN level are as follows: Adults up to 60 years of age: mg/dL Adults over 60 years of age: mg/dLAuthor: Jennifer Huizen.
What are microprocessors made of blood urea nitrogen BUN test measures the amount of urea nitrogen in your blood.
Levels of urea nitrogen is one marker on how well your kidneys are working. This is a simple test done by drawing blood out of your body through a vein in your arm. Urea is mdasure waste product formed in the liver that travels through your how to stream video from pc to tv wireless to the kidneys, which then filters it out of the blood.
It is then carried out of your body through urine. A odes amount of urea in your blood is normal because this process is ongoing. Too much urea shows that it is not being filtered out properly and may indicate a possible problem with the kidneys.
It will be done if you are admitted to an emergency room or during a regular hospital stay. The BUN test may also be ordered as a precaution if you have risk factors for kidney disease.
The BUN test is often ordered if the doctor suspects your symptoms are signs of kidney disease. These include:. The BUN test is a simple blood draw and very little risk is involved. You will sit in a chair and a healthcare professional will insert a thin needle into your arm and draw blood into small vials. You may feel a little prick and the area may bruise slightly afterward. Any marks left by the injection go away quickly.
A bandage taped over the spot can be removed a few hours later. There is nothing you need to do to prepare for the BUN test.
However, many times your doctors will order other blood tests blokd do require worrk to fast not eat or drink in addition to the BUN tests. Ask your doctor if you need to fast before getting your blood work.
They can be a sign of kidney disease or failure. Higher than normal BUN levels may also indicate dehydration, high-protein diet, medications, burns or other conditions. Your doctor tell you what your results mean. Low urea levels are not common and rarely a cause for concern. They can represent a low protein diet or small body type. Cleveland Clinic is a non-profit academic medical center.
Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. It may be ordered as a precaution if you are at risk or ordered to determine why symptoms are happening. Why is blood urea nitrogen BUN test done? These include: Fatigue Frequent urination or not often enough Urine that is dofs or unusual bloody, foamy, coffee-colored Swelling around the eyes or on the face, belly, arms, legs, or feet High blood pressure Nausea or vomiting.
How do I prepare for the blood urea nitrogen BUN test? Show More.
Why it's done
The test measures the amount of urea nitrogen in your blood. Urea nitrogen is one of the waste products removed from your blood by your kidneys. Higher than normal BUN levels may be a sign that your kidneys aren't working efficiently. People with early kidney disease may not have any symptoms. Jan 25, · The blood urea nitrogen test, which is also called a BUN or serum BUN test, measures how much of the waste product you have in your blood. If your levels are off the normal range, Estimated Reading Time: 4 mins. Feb 27, · In general, normal BUN levels fall in the following ranges: adult men: 8 to 24 mg/dL adult women: 6 to 21 mg/dL children 1 to 17 years old: 7 to 20 mg/dLAuthor: Rachel Nall, MSN, CRNA.
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If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please leave a comment or contact us at support selfhacked. Note that each number in parentheses [1, 2, 3, etc. BUN blood urea nitrogen and creatinine are two blood tests that can reveal a lot about your metabolism, kidney, liver, and overall health.
BUN blood urea nitrogen and creatinine are two lab tests that are often ordered as part of a comprehensive metabolic panel. Your doctor may order this panel to get an idea of your overall health and metabolism.
BUN measures the amount of urea in your blood. Urea is a waste product made in the liver as the body processes protein. This protein is mostly derived from the diet, but it can also result from tissue protein turnover [ 1 , 2 , 3 ]. Urea is removed by the kidneys, but the rate of removal depends on the needs of the body. The kidneys can return different amounts of urea into the bloodstream depending on factors such as hydration and blood pressure.
High urea is an important marker of kidney dysfunction as well [ 1 , 2 , 3 ]. Creatinine, on the other hand, is a waste product created from the normal wear and tear of muscles.
It is produced from creatine, a protein that helps generate energy for muscle contractions. Creatinine production essentially reflects muscle mass, and because this mass changes little from day to day, creatinine production tends to be fairly constant [ 3 , 4 , 5 ]. Creatinine is removed from the body by the kidneys, which filter almost all of it from the blood into the urine, at a fairly constant rate.
That is why blood levels are usually a good indicator of how well your kidneys are working [ 3 , 4 , 5 ]. So to recap, BUN levels fluctuate, while creatinine is removed at a constant rate and its blood levels are usually stable. Work with your doctor or other health care professional for an accurate diagnosis. It is important to address any health condition that may be causing the disbalance.
Your doctor will work to find an accurate diagnosis and an appropriate treatment plan, which may include some of the strategies below. Never use any of these in place of what your doctor prescribes. Again, disbalance between BUN and creatinine is often due to a serious medical condition and it is important to address it.
Factors that Decrease Creatinine. Factors that Increase Creatinine. Joe Cohen won the genetic lottery of bad genes. As a kid, he suffered from inflammation, brain fog, fatigue, digestive problems, anxiety, depression, and other issues that were poorly understood in both conventional and alternative medicine.
All of our content is written by scientists and people with a strong science background. Blood Tests 5. Blood Tests 1.